Czech Journal of Animal Science, 2020 (vol. 65), issue 11
The structure of subpopulations of stallion spermatozoa after thawing differs between good and poor freezersOriginal Paper
Filipa Bubeníčková, Jiří Šichtař, Linda Nováčková, Jitka Sirohi, Ondřej Šimoník
Czech J. Anim. Sci., 2020, 65(11):403-410 | DOI: 10.17221/127/2020-CJAS 
The aim of this study was to evaluate differences in the presence of sperm subpopulations in frozen-thawed semen in stallions with different freezability. The motility of individual spermatozoa of 24 stallions from 15 breeds was evaluated using computer-assisted sperm analysis (CASA) immediately after thawing (T0) and after 30 min of incubation (T30). In accordance with our previous studies, samples were initially divided based on their total motility into categories of good (GF) and poor (PF) freezers. K-means cluster analysis of kinematic parameters of spermatozoa was used to divide motile sperm (n = 57 630) into three subpopulations....
Examination of high-resolution feed intake data of growing-finishing pigs confronted with high deoxynivalenol contents present in their feedOriginal Paper
Peter Loibl, Wilhelm Windisch, Wolfgang Preißinger
Czech J. Anim. Sci., 2020, 65(11):411-423 | DOI: 10.17221/189/2020-CJAS
Modern single space feeding systems for fattening pigs allow the detailed assessment of an individual animal's feeding behaviour. In an experiment involving 96 fattening pigs, the influence of deoxynivalenol (DON) contaminated feed (> 4 500 µg/kg DON) on the zootechnical performance and feeding behaviour was compared with a feed with low DON concentration (< 900 µg/kg DON), this served as the control group. Additionally, in separate treatments, two commercial mycotoxin binders were added to the DON-contaminated feeds to assess if an expected...
Analysis of the relationship between milk production, milk composition and morphological udder measurements in Wallachian sheepOriginal Paper
Michal Milerski, Martin Ptáček, Jaromír Ducháček, Jitka Schmidová, Michal Uhrinčať, Luděk Stádník, Vladimír Tančin
Czech J. Anim. Sci., 2020, 65(11):424-430 | DOI: 10.17221/196/2020-CJAS
The aim of this study was to evaluate the potential of udder measurements for prediction of milk yield, milk components and somatic cell count in non-dairy Wallachian sheep. The study was performed on 38 ewes in the Beskids Mountains kept under extensive management on pasture. Milk production (MILK) as well as samples for milk component and somatic cell count determination were collected during two separate control days (42nd day and 100th day of lactation on average). Rear udder depth (RUD, cm), udder width (UW, cm), and teat length (TL, mm) were measured at each control day as well. Linear regressions of udder measurement characteristics...
Effect of cold and warm white light on selected endocrine and immune parameters of broiler embryos and hatchlingsOriginal Paper
Angelika Drozdova, Zuzana Kankova, Michal Zeman
Czech J. Anim. Sci., 2020, 65(11):431-441 | DOI: 10.17221/230/2020-CJAS
Lighting conditions during incubation can influence embryonic development, post-hatching ontogeny and production efficiency. Previous studies revealed that different light colours differently affect pineal melatonin biosynthesis in embryos and postembryonic development of broiler chickens, but physiological mechanisms mediating these effects are not known. Cold and warm white light consists of different wavelengths and therefore the aim of the present study was to explore if these two lights can differently influence the development of circadian melatonin biosynthesis, production of thyroid hormones and corticosterone, concentration of metabolites...